Update to latest robotframework version

[petschki]

This fixes "_start_keyword" errors

[petschki]

ouch ... hudson.plugins.robot is not RF 7 compatible (output XML has changed) see robotframework/robotframework#5018 ... they suggest to use another plugin: https://github.com/jenkinsci/robot-plugin/releases/tag/robot-3.5.0

/cc @gforcada

[gforcada]

🤔 actually we should be fine here, as we are using version 5.0.0 of that Jenkins plugin, and support for Robotframework 7.x was added on 3.5.0

[petschki]

Hm .. strange .. the traceback here looks like the issue I've posted:

-Assigning results to build:
ERROR: Build step failed with exception
java.lang.NullPointerException: Cannot invoke "String.length()" because "text" is null
	at java.base/java.text.SimpleDateFormat.parse(SimpleDateFormat.java:1474)
	at java.base/java.text.DateFormat.parse(DateFormat.java:397)
	at PluginClassLoader for robot//hudson.plugins.robot.model.RobotCaseResult.timeDifference(RobotCaseResult.java:70)
	at PluginClassLoader for robot//hudson.plugins.robot.model.RobotCaseResult.getDuration(RobotCaseResult.java:120)
	at PluginClassLoader for robot//hudson.plugins.robot.model.RobotSuiteResult.tally(RobotSuiteResult.java:418)
	at PluginClassLoader for robot//hudson.plugins.robot.model.RobotSuiteResult.tally(RobotSuiteResult.java:426)
	at PluginClassLoader for robot//hudson.plugins.robot.model.RobotResult.tally(RobotResult.java:416)
	at PluginClassLoader for robot//hudson.plugins.robot.RobotBuildAction.setResult(RobotBuildAction.java:128)
	at PluginClassLoader for robot//hudson.plugins.robot.RobotBuildAction.<init>(RobotBuildAction.java:99)
	at PluginClassLoader for robot//hudson.plugins.robot.RobotPublisher.perform(RobotPublisher.java:318)
	at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:80)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:818)
	at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:767)
	at hudson.model.Build$BuildExecution.post2(Build.java:179)
	at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:711)
	at hudson.model.Run.execute(Run.java:1856)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)
	at hudson.model.ResourceController.execute(ResourceController.java:101)
	at hudson.model.Executor.run(Executor.java:446)
Build step 'Publish Robot Framework test results' marked build as failure

but you're right... we're using the latest RF7 compatible version.